Canon CF-1 User Manual
Page 46
7. Daily Inspection and Maintenance
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The split lines are not
visible.
The split bar is not displayed.
Press the focus indicator switch to
display the split bar.
The pupil is not dilated enough.
Dilate the patient’s pupil. If the pupil is
still too small, press the small pupil
photography switch to activate the small
pupil function.
The positioning is not correct.
Perform positioning.
Eyebrows or eyelashes are
blocking the pupil.
Instruct the patient to open his or her eye
wider.
The patient’s vitreous body is
unclear.
Focusing cannot be performed with the
split lines.
The diopter compensation lever is
set to the - side or + side.
Set to the no compensation position.
The Internal Eye Fixation Target
(sold separately) is used.
The split lines cannot be displayed.
In this case, turn the focus knob to adjust
to the position where the cross-hair lines
and fundus image are clearly visible at
the same time inside the viewfinder.
The split lines display lamp is
burned out.
Contact your sales representative or local
Canon dealer.
The split lines do not
align.
The diopter of the patient’s eye is
outside the range of -10 to +15 D.
Turn the focus knob to focus so that the
cross-hair lines in the field of view and
the fundus image can be seen clearly at
the same time.
Sharp images cannot be
taken.
The pupil is not dilated enough.
Dilate the patient’s pupil. If the pupil is
still too small, press the small pupil
photography switch to activate the small
pupil function.
The positioning is not correct.
Perform positioning.
The image is unfocused.
Focus the image.
Eyebrows or eyelashes are
blocking the pupil.
Instruct the patient to open his or her eye
wider.
The patient’s eye is opaque.
A sharp image cannot be taken.
The patient blinked when the
image was taken.
Take another image.
The flash intensity, diopter
compensation lever, and
viewfinder diopter compensation
ring have not been adjusted.
Adjust the settings.
The objective lens is dirty.
Black spots appear on
photographed images in
the same area.
Dust or another substance is
adhering to the surface of the
objective lens.
Dust or another substance is
adhering to the surface of the
CMOS sensor of the EOS digital
camera.
Clean the CMOS sensor by referring to
the operation manual for the EOS digital
camera.
Problem
Cause
Remedy
000_L-IE-5152E_CF-1.book Page 46 Monday, July 29, 2013 10:30 AM